Four conductor:15 foot (450cm) extension cable terminated with a 3.5mm plug and a3.5mm jack.
The cables areconstructed from the same high quality super annealed copper wire asthe X-Series headphone cables, with braided sheathing. For longer lengths cables may be piggybacked up to 3 cables. Grado guarantees no degradation of sonic quality with Grado headphones while using their extension cable.
